{"id":150,"date":"2023-04-18T21:22:46","date_gmt":"2023-04-18T13:22:46","guid":{"rendered":"https:\/\/www.funworld.cc\/?p=150"},"modified":"2024-01-19T17:24:16","modified_gmt":"2024-01-19T09:24:16","slug":"socket%e7%bc%96%e7%a8%8b","status":"publish","type":"post","link":"https:\/\/blog.itsmygo.cn\/?p=150","title":{"rendered":"Java\u4e2dSocket\u5957\u63a5\u5b57\u7f16\u7a0b"},"content":{"rendered":"<h1>\u524d\u8a00<\/h1>\n<p>\u4e3a\u4e86\u5b9e\u73b0\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u7aef\u4e4b\u95f4\u7684\u8fde\u63a5\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528Socket\u901a\u4fe1\u3002<\/p>\n<p>\u5728Socket\u901a\u4fe1\u4e2d\u6211\u4eec\u53ef\u4ee5\u9009\u62e9TCP\u534f\u8bae\u6216\u8005UDP\u534f\u8bae\u3002<\/p>\n<h2>TCP\u534f\u8bae(Transmission Control Protocol)<\/h2>\n<h3>\u63e1\u624b\u8fde\u63a5<\/h3>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.funworld.cc\/wp-content\/uploads\/2023\/04\/v2-4ac40e3c8b50c9fdd3b5453a6c9a8429_r.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-152 aligncenter\" data-original=\"http:\/\/www.funworld.cc\/wp-content\/uploads\/2023\/04\/v2-4ac40e3c8b50c9fdd3b5453a6c9a8429_r.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\u4e09\u6b21\u63e1\u624b\u8fde\u63a5\" width=\"945\" height=\"447\"  sizes=\"auto, (max-width: 945px) 100vw, 945px\" \/><\/div><\/p>\n<p>\u6b64\u5904\u5ba2\u6237\u7aef\u5148\u901a\u8fc7connect\u5411\u670d\u52a1\u5668\u4e3b\u52a8\u53d1\u51fa\u8fde\u63a5\u7533\u8bf7\u540c\u6b65<span class='badge badge-primary'>SYN J<\/span>\uff08\u7b2c\u4e00\u6b21\u63e1\u624b\uff09\uff0c\u670d\u52a1\u5668\u63a5\u6536\u5230<span class='badge badge-primary'>SYN J<\/span>\u540e\u53d1\u9001\u4e86\u786e\u8ba4\u6570\u636e<span class='badge badge-primary'>ACK J+1<\/span>\u4e0e\u7533\u8bf7\u540c\u6b65<span class='badge badge-primary'>SYN K<\/span>\uff08\u7b2c\u4e8c\u6b21\u63e1\u624b\uff09\uff0c\u5ba2\u6237\u7aef\u63a5\u6536\u5230\u4e86\u6570\u636e\u540e\u77e5\u9053\u4e86\u670d\u52a1\u5668\u53ef\u4ee5\u8fdb\u884c\u901a\u8baf\u8bf7\u6c42\uff0c\u5ba2\u6237\u7aef\u53d1\u9001\u786e\u8ba4\u6570\u636e<span class='badge badge-primary'>ACK K+1<\/span>\uff08\u7b2c\u4e09\u6b21\u63e1\u624b\uff09\u3002\u6210\u529f\u540e\u4fbf\u53ef\u5f00\u59cb\u4ea4\u6362\u6570\u636e\u3002<\/p>\n<h3>\u4ea4\u6362\u6570\u636e<\/h3>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.funworld.cc\/wp-content\/uploads\/2023\/04\/v2-783af409d7ee2d26fb7b9155ed8e7882_r.jpg'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" class=\"wp-image-155 aligncenter\" data-original=\"http:\/\/www.funworld.cc\/wp-content\/uploads\/2023\/04\/v2-783af409d7ee2d26fb7b9155ed8e7882_r.jpg\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"TCP-Transport\" width=\"549\" height=\"564\"  sizes=\"auto, (max-width: 549px) 100vw, 549px\" \/><\/div><\/p>\n<p>\u8bf7\u6c42\u5efa\u7acb\u540e\uff0c\u5ba2\u6237\u7aef\u5411\u670d\u52a1\u7aef\u5199\u51fa\u6570\u636e\uff0c\u670d\u52a1\u7aef\u8bfb\u5230\u5ba2\u6237\u7aef\u7684\u6570\u636e\u540e\uff0c\u5904\u7406\u4e4b\u540ewrite\u7ed9\u5ba2\u6237\u7aef\uff0c\u4e00\u6b21\u4ea4\u4e92\u7ed3\u675f\u3002<\/p>\n<h3>\u6325\u624b\u7ed3\u675f<\/h3>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.funworld.cc\/wp-content\/uploads\/2023\/04\/ac17114439ca230974ba3b874eb088a2.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-157\" data-original=\"http:\/\/www.funworld.cc\/wp-content\/uploads\/2023\/04\/ac17114439ca230974ba3b874eb088a2.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"TCP-Close\" width=\"581\" height=\"551\"  sizes=\"auto, (max-width: 581px) 100vw, 581px\" \/><\/div><\/p>\n<p>\u5728\u8fde\u63a5\u5173\u95ed\u7684\u65f6\u5019\uff0c\u670d\u52a1\u5668\u548c\u5ba2\u6237\u7aef\u4e4b\u95f4\u5c06\u8fdb\u884c\u56db\u6b21\u6325\u624b\uff0c\u7b2c\u4e00\u6b21\u7531\u5ba2\u6237\u7aef\u53d1\u9001<span class='badge badge-primary'>FIN M<\/span>\uff0c\u8fdb\u5165\u7ec8\u6b62\u7b49\u5f851\u72b6\u6001\uff0c\u670d\u52a1\u5668\u63a5\u6536\u5230\u5ba2\u6237\u7aef\u7684\u7ed3\u675f\u8bf7\u6c42\u540e\u8fdb\u5165\u5173\u95ed\u7b49\u5f85\u72b6\u6001\uff0c\u5e76\u5411\u5ba2\u6237\u7aef\u53d1\u9001\u786e\u8ba4<span class='badge badge-primary'>ACK M+1<\/span>\u4e0e\u7ed3\u675f\u8bf7\u6c42<span class='badge badge-primary'>FIN N<\/span>\uff0c\u5ba2\u6237\u7aef\u63a5\u6536\u5230\u786e\u8ba4\u8bf7\u6c42\u540e\u8fdb\u5165\u7ec8\u6b62\u7b49\u5f852\u72b6\u6001\uff0c\u670d\u52a1\u7aef\u7684\u7ed3\u675f\u8bf7\u6c42\u88ab\u5ba2\u6237\u7aef\u63a5\u6536\u4e4b\u540e\uff0c\u7531\u5ba2\u6237\u7aef\u540c\u610f\u670d\u52a1\u7aef\u5173\u95ed\u8bf7\u6c42\uff0c\u53d1\u9001<span class='badge badge-primary'>ACK N+1<\/span>\uff0c\u5ba2\u6237\u7aef\u5ef6\u65f6\u5173\u95ed\uff0c\u670d\u52a1\u7aef\u63a5\u6536\u5230\u6700\u540e\u7684\u786e\u5b9a\u540e\u624d\u5173\u95ed\u3002<\/p>\n<div  class='collapse-block shadow-sm collapse-block-transparent collapsed hide-border-left'><div class='collapse-block-title'><span class='collapse-block-title-inner'>TCP\u6807\u8bc6\u7b26\u542b\u4e49<\/span><i class='collapse-icon fa fa-angle-down'><\/i><\/div><div class='collapse-block-body' style='display:none;'><\/p>\n<p><span class='badge badge-primary'>*SYN\uff1a\u540c\u6b65\u6807\u5fd7<\/span><\/p>\n<p>\u540c\u6b65\u5e8f\u5217\u7f16\u53f7(Synchronize Sequence Numbers)\u680f\u6709\u6548\u3002\u8be5\u6807\u5fd7\u4ec5\u5728\u4e09\u6b21\u63e1\u624b\u5efa\u7acbTCP\u8fde\u63a5\u65f6\u6709\u6548\u3002\u5b83\u63d0\u793aTCP\u8fde\u63a5\u7684\u670d\u52a1\u7aef\u68c0\u67e5\u5e8f\u5217\u7f16\u53f7\uff0c\u8be5\u5e8f\u5217\u7f16\u53f7\u4e3aTCP\u8fde\u63a5\u521d\u59cb\u7aef(\u4e00\u822c\u662f\u5ba2\u6237\u7aef)\u7684\u521d\u59cb\u5e8f\u5217\u7f16\u53f7\u3002\u5728\u8fd9\u91cc\uff0c\u53ef\u4ee5\u628aTCP\u5e8f\u5217\u7f16\u53f7\u770b\u4f5c\u662f\u4e00\u4e2a\u8303\u56f4\u4ece0\u52304\uff0c294\uff0c967\uff0c295\u768432\u4f4d\u8ba1\u6570\u5668\u3002\u901a\u8fc7TCP\u8fde\u63a5\u4ea4\u6362\u7684\u6570\u636e\u4e2d\u6bcf\u4e00\u4e2a\u5b57\u8282\u90fd\u7ecf\u8fc7\u5e8f\u5217\u7f16\u53f7\u3002\u5728TCP\u62a5\u5934\u4e2d\u7684\u5e8f\u5217\u7f16\u53f7\u680f\u5305\u62ec\u4e86TCP\u5206\u6bb5\u4e2d\u7b2c\u4e00\u4e2a\u5b57\u8282\u7684\u5e8f\u5217\u7f16\u53f7\u3002<\/p>\n<p><span class='badge badge-primary'>*ACK\uff1a\u786e\u8ba4\u6807\u5fd7<\/span><\/p>\n<p>\u786e\u8ba4\u7f16\u53f7(Acknowledgement Number)\u680f\u6709\u6548\u3002\u5927\u591a\u6570\u60c5\u51b5\u4e0b\u8be5\u6807\u5fd7\u4f4d\u662f\u7f6e\u4f4d\u7684\u3002TCP\u62a5\u5934\u5185\u7684\u786e\u8ba4\u7f16\u53f7\u680f\u5185\u5305\u542b\u7684\u786e\u8ba4\u7f16\u53f7(w+1\uff0cFigure-1)\u4e3a\u4e0b\u4e00\u4e2a\u9884\u671f\u7684\u5e8f\u5217\u7f16\u53f7\uff0c\u540c\u65f6\u63d0\u793a\u8fdc\u7aef\u7cfb\u7edf\u5df2\u7ecf\u6210\u529f\u63a5\u6536\u6240\u6709\u6570\u636e\u3002<\/p>\n<p><span class='badge badge-primary'>*RST\uff1a\u590d\u4f4d\u6807\u5fd7<\/span><\/p>\n<p>e799bee5baa6e997aee7ad94e78988e69d8331333337613761\u6807\u5fd7<br \/>\n\u590d\u4f4d\u6807\u5fd7\u6709\u6548\u3002\u7528\u4e8e\u590d\u4f4d\u76f8\u5e94\u7684TCP\u8fde\u63a5\u3002<\/p>\n<p><span class='badge badge-primary'>*URG\uff1a\u7d27\u6025\u6807\u5fd7<\/span><\/p>\n<p>\u7d27\u6025(The urgent pointer) \u6807\u5fd7\u6709\u6548\uff0c\u7d27\u6025\u6807\u5fd7\u7f6e\u4f4d\u3002<\/p>\n<p><span class='badge badge-primary'>*PSH\uff1a\u63a8\u6807\u5fd7<\/span><\/p>\n<p>\u8be5\u6807\u5fd7\u7f6e\u4f4d\u65f6\uff0c\u63a5\u6536\u7aef\u4e0d\u5c06\u8be5\u6570\u636e\u8fdb\u884c\u961f\u5217\u5904\u7406\uff0c\u800c\u662f\u5c3d\u53ef\u80fd\u5feb\u5c06\u6570\u636e\u8f6c\u7531\u5e94\u7528\u5904\u7406\u3002\u5728\u5904\u7406 telnet \u6216 rlogin \u7b49\u4ea4\u4e92\u6a21\u5f0f\u7684\u8fde\u63a5\u65f6\uff0c\u8be5\u6807\u5fd7\u603b\u662f\u7f6e\u4f4d\u7684\u3002<\/p>\n<p><span class='badge badge-primary'>*FIN\uff1a\u7ed3\u675f\u6807\u5fd7<\/span><\/p>\n<p>\u5e26\u6709\u8be5\u6807\u5fd7\u7f6e\u4f4d\u7684\u6570\u636e\u5305\u7528\u6765\u7ed3\u675f\u4e00\u4e2aTCP\u56de\u8bdd\uff0c\u4f46\u5bf9\u5e94\u7aef\u53e3\u4ecd\u5904\u4e8e\u5f00\u653e\u72b6\u6001\uff0c\u51c6\u5907\u63a5\u6536\u540e\u7eed\u6570\u636e<\/p>\n<p><\/div><\/div>\n<p>&nbsp;<\/p>\n<h2>UDP\u534f\u8bae(User Datagram Protocol)<\/h2>\n<h3>\u7279\u6027<\/h3>\n<p data-pid=\"bd7i_n2r\">UDP\uff08UserDatagramProtocol\uff09\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u9762\u5411\u6d88\u606f\u7684\u4f20\u8f93\u5c42\u534f\u8bae\uff0c\u5c3d\u7ba1UDP\u63d0\u4f9b\u6807\u5934\u548c\u6709\u6548\u8d1f\u8f7d\u7684\u5b8c\u6574\u6027\u9a8c\u8bc1\uff08\u901a\u8fc7\u6821\u9a8c\u548c\uff09\uff0c\u4f46\u5b83\u4e0d\u4fdd\u8bc1\u5411\u4e0a\u5c42\u534f\u8bae\u63d0\u4f9b\u6d88\u606f\u4f20\u9012\uff0c\u5e76\u4e14UDP\u5c42\u5728\u53d1\u9001\u540e\u4e0d\u4f1a\u4fdd\u7559UDP \u6d88\u606f\u7684\u72b6\u6001\u3002\u56e0\u6b64\uff0cUDP\u6709\u65f6\u88ab\u79f0\u4e3a\u4e0d\u53ef\u9760\u7684\u6570\u636e\u62a5\u534f\u8bae\u3002\u5982\u679c\u9700\u8981\u4f20\u8f93\u53ef\u9760\u6027\uff0c\u5219\u5fc5\u987b\u5728\u7528\u6237\u5e94\u7528\u7a0b\u5e8f\u4e2d\u5b9e\u73b0\u3002<\/p>\n<p data-pid=\"IiCzV8tR\">UDP\u4f7f\u7528\u5177\u6709\u6700\u5c0f\u534f\u8bae\u673a\u5236\u7684\u7b80\u5355\u65e0\u8fde\u63a5\u901a\u4fe1\u6a21\u578b\u3002UDP\u63d0\u4f9b\u6570\u636e\u5b8c\u6574\u6027\u7684\u6821\u9a8c\u548c\uff0c\u4ee5\u53ca\u7528\u4e8e\u5728\u6570\u636e\u62a5\u7684\u6e90\u548c\u76ee\u6807\u5bfb\u5740\u4e0d\u540c\u51fd\u6570\u7684\u7aef\u53e3\u53f7\u3002\u5b83\u6ca1\u6709\u63e1\u624b\u5bf9\u8bdd\uff0c\u56e0\u6b64\u5c06\u7528\u6237\u7684\u7a0b\u5e8f\u66b4\u9732\u5728\u5e95\u5c42\u7f51\u7edc\u7684\u4efb\u4f55\u4e0d\u53ef\u9760\u7684\u65b9\u9762\u3002\u5982\u679c\u5728\u7f51\u7edc\u63a5\u53e3\u7ea7\u522b\u9700\u8981\u7ea0\u9519\u529f\u80fd\uff0c\u5e94\u7528\u7a0b\u5e8f\u53ef\u4ee5\u4f7f\u7528\u4e3a\u6b64\u76ee\u7684\u8bbe\u8ba1\u7684\u4f20\u8f93\u63a7\u5236\u534f\u8bae\uff08TCP\uff09\u3002<\/p>\n<p data-pid=\"z17GOAiY\">\u7efc\u4e0a\u6240\u8ff0\uff1a<\/p>\n<p data-pid=\"vWmMC0jC\">UDP\u662f\u57fa\u4e8eIP\u7684\u7b80\u5355\u534f\u8bae\uff0c\u4e0d\u53ef\u9760\u7684\u534f\u8bae\u3002<\/p>\n<p data-pid=\"eKB0ZxMn\">UDP\u7684\u4f18\u70b9\uff1a\u7b80\u5355\uff0c\u8f7b\u91cf\u5316\u3002<\/p>\n<p data-pid=\"LvxMuf-L\">UDP\u7684\u7f3a\u70b9\uff1a\u6ca1\u6709\u6d41\u63a7\u5236\uff0c\u6ca1\u6709\u5e94\u7b54\u786e\u8ba4\u673a\u5236\uff0c\u4e0d\u80fd\u89e3\u51b3\u4e22\u5305\u3001\u91cd\u53d1\u3001\u9519\u5e8f\u95ee\u9898\u3002<\/p>\n<p data-pid=\"55nwPyI7\">\u8fd9\u91cc\u9700\u8981\u6ce8\u610f\u4e00\u70b9\uff0c\u5e76\u4e0d\u662f\u6240\u6709\u4f7f\u7528UDP\u534f\u8bae\u7684\u5e94\u7528\u5c42\u90fd\u662f\u4e0d\u53ef\u9760\u7684\uff0c\u5e94\u7528\u7a0b\u5e8f\u53ef\u4ee5\u81ea\u5df1\u5b9e\u73b0\u53ef\u9760\u7684\u6570\u636e\u4f20\u8f93\uff0c\u901a\u8fc7\u589e\u52a0\u786e\u8ba4\u548c\u91cd\u4f20\u673a\u5236\uff0c\u6240\u4ee5\u4f7f\u7528UDP \u534f\u8bae\u6700\u5927\u7684\u7279\u70b9\u5c31\u662f\u901f\u5ea6\u5feb\u3002<\/p>\n<p data-pid=\"55nwPyI7\">UDP\u53ef\u4ee5\u76f4\u63a5\u8fdb\u884c\u8fde\u63a5\u4f20\u8f93\uff0c\u4e0d\u9700\u8981\u50cfTCP\u4e00\u6837\u8fdb\u884c\u63e1\u624b\u540e\u624d\u80fd\u8fde\u63a5\uff0c\u4f46\u662f\u56e0\u4e3a\u4e22\u5305\u95ee\u9898\u548c\u9519\u5e8f\u95ee\u9898\uff0c\u4e0d\u80fd\u7528\u4e8e\u4f20\u8f93\u4e00\u4e9b\u4e25\u683c\u8981\u6c42\u7684\u6570\u636e\uff0cQQ\u8bed\u97f3\u4fbf\u662f\u5efa\u7acb\u5728UDP\u8fde\u63a5\u4f20\u8f93\u534f\u8bae\u4e0a\u7684\uff0c\u56e0\u4e3a\u8bed\u97f3\u5076\u5c14\u4e22\u51e0\u4e2a\u5305\u90fd\u65e0\u4f24\u5927\u96c5\uff0c\u4f46\u662f\u4f20\u8f93\u4e00\u4e9b\u7cbe\u786e\u7684\u6570\u636e\u5305\u65f6\uff0c\u8fd8\u662f\u5e94\u8be5\u4f7f\u7528TCP\u3002<\/p>\n<h1>\u5728Java\u4e2d\u8fdb\u884cSocket\u7f16\u7a0b<\/h1>\n<h2>TCP<\/h2>\n<p>\u5728Java\u4e2d\u8fdb\u884cSocket\u7f16\u7a0b\uff0c\u6211\u4eec\u9700\u8981\u4f7f\u7528java.net\u4e2d\u7684Socket\u3002<\/p>\n<h3>\u670d\u52a1\u5668<\/h3>\n<p>\u5728\u670d\u52a1\u5668\u4e2d\uff0c\u9996\u5148\u6211\u4eec\u8981\u521b\u5efa\u4e00\u4e2aServerSocket\u7684\u5bf9\u8c61\u5b9e\u4f8b\uff0c\u5728\u8fd9\u91cc\u6211\u4eec\u5f00\u653e2000\u4e3a\u7aef\u53e3\u3002<\/p>\n<pre class=\"code\">ServerSocket s_socket = new ServerSocket(2000);<\/pre>\n<p>\u56e0\u4e3a\u670d\u52a1\u7aef\u5f00\u542f\u540e\uff0c\u4e0d\u4e00\u5b9a\u6709\u5ba2\u6237\u7aef\u7acb\u9a6c\u8fde\u63a5\u4e0a\u6765\uff0c\u6240\u4ee5\u6211\u4eec\u8981\u4f7f\u7528Socket\u5bf9\u8c61\u91cc\u7684accept\u65b9\u6cd5\u5835\u585e\u7ebf\u7a0b\uff0c\u4f46\u662f\u5835\u585e\u4e86\u4e3b\u7ebf\u7a0b\u540e\uff0c\u6211\u4eec\u53ea\u80fd\u4fdd\u8bc1\u4e00\u4e2a\u670d\u52a1\u7aef\u53ea\u80fd\u8fde\u63a5\u4e00\u4e2a\u5ba2\u6237\u7aef\uff0c\u4f46\u662f\u6211\u4eec\u60f3\u8981\u4e00\u4e2a\u670d\u52a1\u7aef\u53ef\u4ee5\u8fde\u63a5\u591a\u4e2a\u5ba2\u6237\u7aef\uff0c\u90a3\u4e48\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u591a\u7ebf\u7a0b\u6765\u5b9e\u73b0\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\">while(true){\r\n    Socket socket = s_socket.accept();\r\n    ServerHandler handler = new ServerHandler(socket);\r\n    handler.start();\r\n    System.out.println(\"Connecting IP:\"+socket.getInetAddress().getHostAddress());\r\n}<\/pre>\n<p>\u6211\u4f7f\u7528\u7684while(true)\u6765\u8f6e\u8be2\uff0c\u7b2c\u4e00\u6b21accept\u963b\u585e\u540e\uff0c\u6b7b\u5faa\u73af\u4e0d\u4f1a\u5411\u4e0b\u6267\u884c\uff0c\u5f53\u5ba2\u6237\u7aef\u8fde\u63a5\u5230\u670d\u52a1\u7aef\u540e\uff0c\u670d\u52a1\u7aefaccept\u88ab\u52a8\u5f00\u542f\uff0c\u4f7f\u5f97\u4ee3\u7801\u53ef\u4ee5\u7ee7\u7eed\u5411\u4e0b\u6267\u884c\uff0c\u8fd9\u91cc\u7684ServerHandler\u662f\u521b\u5efa\u7684\u7ee7\u627f\u4e86Thread\u7684\u7c7b\uff0c\u5c06\u5728\u4e0b\u9762\u63d0\u5230\uff0c\u4f20\u5165socket\u5957\u63a5\u5b57\u540e\u5f00\u542f\u65b0\u7ebf\u7a0b\uff0c\u8f93\u51fa\u8bed\u53e5\u3002<\/p>\n<p>\u7136\u540e\u662fServerHandler\u7c7b\u7684\u5b9e\u73b0\u3002\u7ee7\u627f\u4e86Thread\u540e\u4fbf\u53ef\u4ee5\u4f7f\u7528start()\u5f00\u542f\u65b0\u7ebf\u7a0b\uff0c\u8fd9\u91cc\u6211\u4eec\u5148\u4f20\u5165Socket\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\">private Socket socket;\r\n\r\npublic ServerHandler(Socket socket){\r\n    this.socket = socket;\r\n}<\/pre>\n<p>\u7136\u540e\u8986\u5199Thread\u7684run\u65b9\u6cd5\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\">@Override\r\npublic void run() {\r\n    try {\r\n        BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));\r\n        String info = null;\r\n        while((info = br.readLine()) != null){\r\n            System.out.println(socket.getInetAddress().getHostAddress()+\":\"+info);\r\n        }\r\n        \/\/socket.shutdownInput(); \/\/ \u544a\u8bc9\u5ba2\u6237\u7aef\uff0c\u8f93\u5165\u6d41\u5173\u95ed\uff0c\u4e0d\u5fc5\u8f93\u5165\u4e86\uff0c\u6d41\u7a0b\u7ed3\u675f\uff0c\u5173\u95ed\u8fde\u63a5\r\n        PrintWriter pw = new PrintWriter(socket.getOutputStream());\r\n        pw.println(\"I'm a Server\");\r\n        pw.println(\"You said \"+info);\r\n        pw.flush();\r\n        socket.shutdownOutput(); \/\/ \u544a\u8bc9\u5ba2\u6237\u7aef\uff0c\u6211\u5df2\u7ecf\u4e0d\u4f1a\u8f93\u51fa\u4e86\uff01\u5ba2\u6237\u7aef\u7684Reader\u5c31\u53ef\u4ee5\u5f00\u59cb\u8bfb\u53d6\u6d41\u4e86\r\n        System.out.println(\"Ending!\");\r\n    } catch (IOException e) {\r\n        throw new RuntimeException(e);\r\n    }\r\n}<\/pre>\n<p>\u8fd9\u91cc\u4f7f\u7528shutdownOutput()\/shutdownInput()\u662f\u9632\u6b62\u7ebf\u7a0b\u5361\u6b7b\uff0c\u56e0\u4e3a\u670d\u52a1\u7aef\u4e0d\u77e5\u9053\u5ba2\u6237\u7aef\u7684\u8bdd\u8bf4\u5b8c\u4e86\u6ca1\u6709\uff0c\u5982\u679c\u5ba2\u6237\u7aef\u6ca1\u6709\u8fdb\u884cshutdownOutput()\u64cd\u4f5c\uff0c\u5219\u9700\u8981\u670d\u52a1\u7aef\u81ea\u884c\u8c03\u7528ShutdownInput()\u6765\u5173\u95ed\u6d41\u3002\u6b64\u5904\u7684shutdownOutput()\u662f\u544a\u8bc9\u5ba2\u6237\u7aef\uff0c\u6211\u7684\u8f93\u51fa\u6d41\u5173\u95ed\u4e86\uff0c\u4f60\u53ef\u4ee5\u5411\u4e0b\u6267\u884c\u4e86\u3002<\/p>\n<h3>\u5ba2\u6237\u7aef<\/h3>\n<p>\u56e0\u4e3a\u5ba2\u6237\u7aef\u53ea\u9700\u8981\u7528\u4e00\u4e2a\u5ba2\u6237\u7aef\u5bf9\u5e94\u4e00\u4e2a\u670d\u52a1\u7aef\uff0c\u4e0d\u9700\u8981\u7528\u591a\u7ebf\u7a0b\u3002<\/p>\n<p>\u8fde\u63a5\u5ba2\u6237\u7aef\u6211\u4eec\u9700\u8981\u521b\u5efaSocket\u3002<\/p>\n<pre class=\"code\">Socket socket = new Socket(\"localhost\",2000);<\/pre>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\">public static void main(String[] main) throws IOException, InterruptedException {\r\n    Socket socket = new Socket(\"localhost\",2000);\r\n    PrintWriter pw = new PrintWriter(new OutputStreamWriter(socket.getOutputStream()));\r\n    pw.println(\"Hello World!\");\r\n    pw.flush();\r\n    socket.shutdownOutput(); \/\/ \u544a\u8bc9\u670d\u52a1\u5668\uff0c\u6211\u5df2\u7ecf\u4e0d\u4f1a\u8f93\u51fa\u4e86\uff01\u670d\u52a1\u5668\u7684Reader\u5c31\u53ef\u4ee5\u5f00\u59cb\u8bfb\u53d6\u6d41\u4e86\r\n    BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));\r\n    String temp = null;\r\n    while((temp = br.readLine()) != null) {\r\n        System.out.println(socket.getInetAddress().getHostAddress() + \":\" + temp);\r\n    }\r\n    \/\/socket.shutdownInput(); \/\/ \u544a\u8bc9\u670d\u52a1\u5668\uff0c\u8f93\u5165\u6d41\u5173\u95ed\uff0c\u4e0d\u5fc5\u8f93\u5165\u4e86\uff0c\u6d41\u7a0b\u7ed3\u675f\uff0c\u5173\u95ed\u8fde\u63a5\r\n    System.out.println(\"Ending!\");\r\n    socket.close();\r\n}<\/pre>\n<p>\u8fd9\u91cc\u521b\u5efa\u4e86Socket\u5bf9\u8c61\uff0c\u8fde\u63a5\u5230localhost:2000\u3002\u5c06Socket\u7684\u8f93\u51fa\u6d41\u6307\u5411PrintWriter\uff0c\u4f7f\u7528println\u5411\u6d41\u4e2d\u8f93\u51fa\u5b57\u7b26\u4e32\uff0c\u8fd9\u91cc\u7528println\u662f\u56e0\u4e3a\u5728\u8fd9\u91cc\u8f93\u51fa\u5b57\u7b26\u4e32\u540e\u4f1a\u81ea\u52a8\u6362\u884c\uff0c\u670d\u52a1\u5668\u4e2d\u8bfb\u53d6\u5b57\u7b26\u4e32\u662f\u68c0\u6d4b\u8be5\u884c\u662f\u5426\u4e3anull\u3002\u8f93\u51fa\u6d41\u5173\u95ed\u540e\u544a\u8bc9\u670d\u52a1\u7aef\u6211\u7684\u6d41\u5173\u4e86\uff0c\u670d\u52a1\u7aef\u53ef\u4ee5\u5411\u4e0b\u6267\u884c\u4e86\uff0c\u4e8e\u662f\u670d\u52a1\u7aef\u5f00\u59cb\u5411\u5ba2\u6237\u7aef\u8f93\u51fa\u6d41\u5199\u51fa\u5b57\u7b26\u4e32\uff0c\u5ba2\u6237\u7aef\u8bfb\u53d6\u5230\u5b57\u7b26\u4e32\u3002<\/p>\n<blockquote><p>Client:<\/p>\n<p>127.0.0.1:I&#8217;m a Server<br \/>\n127.0.0.1:You said null<br \/>\nEnding!<\/p><\/blockquote>\n<p>&nbsp;<\/p>\n<blockquote><p>Server:<\/p>\n<p>Start Listening:<br \/>\nConnecting IP:127.0.0.1<br \/>\n127.0.0.1:Hello World!<br \/>\nEnding!<\/p><\/blockquote>\n<h2>UDP<\/h2>\n<p>Java\u4f7f\u7528UDP\u534f\u8bae\uff0c\u9700\u8981\u7528\u5230DatagramSocket\u4e0eDatagramPacket\u7c7b\u3002<\/p>\n<h3>\u670d\u52a1\u5668<\/h3>\n<p>\u5728\u670d\u52a1\u5668\u4e2d\uff0c\u6211\u4eec\u4e5f\u5e94\u8be5\u6309\u7167\u4e00\u5bf9\u591a\u6765\u4f7f\u7528\u591a\u7ebf\u7a0b\u3002UDP\u7684\u670d\u52a1\u5668\u521b\u5efaSocket\u9700\u8981\u4f7f\u7528<\/p>\n<pre class=\"code\">DatagramSocket socket = new DatagramSocket(8080);<\/pre>\n<p>\u8fd9\u91cc\u6307\u5b9a\u4e86\u7aef\u53e3\u4e3a8080\uff0c\u5982\u679c\u60f3\u8981\u4f7f\u7528bind\u65b9\u6cd5\uff0c\u5219\u5e94\u8be5\u4f7f\u7528<\/p>\n<pre class=\"code\">DatagramSocket socket = new DatagramSocket(null);\r\nsocket.bind(new InetSocketAddress(\"localhost\",8080));<\/pre>\n<p>\u5957\u63a5\u5b57\u521b\u5efa\u5b8c\u6210\u540e\uff0c\u6211\u4eec\u9700\u8981\u505a\u7684\u5c31\u662f\u8f6e\u8be2\u662f\u5426\u6709\u5ba2\u6237\u7aef\u5411\u670d\u52a1\u7aef\u53d1\u9001\u6570\u636e\u5305\u4e86<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\">byte[] buf = new byte[1024];\r\nDatagramPacket receivePacket = new DatagramPacket(buf,buf.length); \/\/ \u521b\u5efa\u63a5\u6536\u5305\r\nwhile(true){\r\n    socket.receive(receivePacket); \/\/ \u82e5\u6ca1\u6709\u6536\u5230\u5305 \u5219\u963b\u585e\u8be5\u8fdb\u7a0b \u63a8\u8350\u591a\u7ebf\u7a0b \u7c7b\u4f3c\u4e0a\u8ff0\u4f8b\u5b50\r\n    new Thread(()-&gt;{\r\n            String pac = new String(buf,0,receivePacket.getLength()); \/\/ \u5c06\u6536\u5230\u7684\u6570\u636e\u8f6c\u6210String\r\n            System.out.println(receivePacket.getAddress().getHostAddress()+\":\"+pac);\r\n            String info = Thread.currentThread().toString()+\"I'm a Server!\";\r\n            DatagramPacket sendPacket = new DatagramPacket(info.getBytes(StandardCharsets.UTF_8),info.getBytes().length,receivePacket.getSocketAddress());\r\n        try {\r\n            socket.send(sendPacket);\r\n        } catch (IOException e) {\r\n            throw new RuntimeException(e);\r\n        }\r\n    }).start(); \/\/ \u65b0\u7ebf\u7a0b\r\n}<\/pre>\n<p>\u6211\u4eec\u53ef\u4ee5\u53d1\u73b0\uff0cUDP\u5c31\u4e0d\u662faccept\u6765\u963b\u585e\u7ebf\u7a0b\u4e86\uff0c\u800c\u662f\u4f7f\u7528receive\u963b\u585e\u7ebf\u7a0b\uff0c<div class='alert alert-primary'><span class='alert-inner--text'>\u56e0\u4e3aUDP\u53ef\u4ee5\u76f4\u63a5\u8fdb\u884c\u8fde\u63a5\u4f20\u8f93\uff0c\u4e0d\u9700\u8981\u50cfTCP\u4e00\u6837\u8fdb\u884c\u63e1\u624b\u540e\u624d\u80fd\u8fde\u63a5<\/span><\/div><\/p>\n<h3>\u5ba2\u6237\u7aef<\/h3>\n<p>\u5ba2\u6237\u7aef\u4e5f\u9700\u8981<\/p>\n<pre class=\"code\">DatagramSocket socket = new DatagramSocket();<\/pre>\n<p>\u8fd9\u91cc\u5982\u679c\u4e0d\u4f20\u5165\u53c2\u6570\u5219\u4f1a\u81ea\u52a8\u5206\u914d\u7aef\u53e3\u521b\u5efaUDP Socket\uff0c\u800cTCP\u7684Socket\u5ba2\u6237\u7aef\u8fde\u63a5\u670d\u52a1\u7aef\u662f\u76f4\u63a5\u8fde\u63a5\u81f3\u670d\u52a1\u7aef\u5730\u5740\u7684\u3002\u8fd9\u91cc\u5c31\u8981\u63d0\u5230DatagramPacket\u4e86\u3002<\/p>\n<pre class=\"code\">DatagramPacket packet = new DatagramPacket(byte[] buf,int length);\r\nDatagramPacket packet = new DatagramPacket(byte[] buf,int length,SocketAddress address);<\/pre>\n<pre>DatagramPacket\u6709\u51e0\u79cd\u521d\u59cb\u5316\u65b9\u5f0f\uff0c\u8fd9\u91cc\u53ea\u63d0\u8fd9\u4e24\u79cd\uff1a\r\n-\u7b2c\u4e00\u79cd\u7528\u4e8eSocket.receive(packet)\u6765\u5b58\u50a8\u63a5\u6536\u7684\u5305\u7684\u4fe1\u606f\u3002\r\n-\u7b2c\u4e8c\u79cd\u5219\u5305\u542b\u4e86\u8fd9\u4e2a\u5305\u7684\u53d1\u9001\u4fe1\u606f\uff0caddress\u8868\u793a\u8fd9\u4e2a\u5305\u5c06\u53d1\u5230\u54ea\u4e2a\u5730\u5740\u3002<\/pre>\n<p>\u4f7f\u7528socket.send(packet)\u5373\u53ef\u5c06\u5305\u542b\u76ee\u6807\u5730\u5740\u7684packet\u53d1\u9001\u5230\u6307\u5b9a\u76ee\u6807\u5730\u5740\uff0c\u6240\u4ee5\u6211\u4eec\u5728\u670d\u52a1\u7aef\u53ef\u4ee5\u8fd9\u6837\u5199\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\">InetSocketAddress serverAddress = new InetSocketAddress(\"localhost\",8080);\r\nString info = \"I'm Client!\";\r\nDatagramPacket sendPacket = new DatagramPacket(info.getBytes(StandardCharsets.UTF_8),info.getBytes().length,serverAddress);\r\nDatagramSocket socket = new DatagramSocket();\r\nsocket.send(sendPacket);\r\nbyte temp[] = new byte[1024];\r\nDatagramPacket receivePacket = new DatagramPacket(temp,temp.length);\r\nsocket.receive(receivePacket); \/\/ \u82e5\u6ca1\u6709\u6536\u5230\u5305 \u5219\u963b\u585e\u8be5\u8fdb\u7a0b\r\nSystem.out.println(receivePacket.getAddress().getHostAddress()+\":\"+new String(temp,0,receivePacket.getLength()));<\/pre>\n<blockquote><p>Client:<\/p>\n<p>127.0.0.1:Thread[Thread-0,5,main]I&#8217;m a Server!<\/p><\/blockquote>\n<p>&nbsp;<\/p>\n<blockquote><p>Server:<\/p>\n<p>127.0.0.1:I&#8217;m Client!<\/p><\/blockquote>\n<p>\u8fd9\u5c31\u662fUDP\u4f20\u8f93\u534f\u8bae\u7684demo\uff0c\u76f8\u6bd4TCP\u66f4\u52a0\u7b80\u6d01\uff0c\u4e24\u8005\u5404\u6709\u6240\u957f\u3002<\/p>\n<h1>\u603b\u7ed3<\/h1>\n<p>TCP\u9002\u5408\u7528\u4e8e\u6e38\u620f\u670d\u52a1\u5668\u4e0e\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\uff0c\u7fa4\u7ec4\u804a\u5929\uff0c\u6587\u4ef6\u4f20\u8f93\u7b49\u7b49\u3002<\/p>\n<p>UDP\u9002\u5408\u7528\u4e8e\u8bed\u97f3\u804a\u5929\uff0c\u90e8\u5206\u5c0f\u6e38\u620f\u670d\u52a1\u5668\u548c\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u7b49\u7b49\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>TCP\u6709\u4e09\u63e1\u624b\u548c\u56db\u6325\u624b\uff0c\u800cUDP\u662f\u76f4\u63a5\u8fdb\u884c\u6570\u636e\u4f20\u8f93\uff0c\u6ca1\u6709\u63e1\u624b\u548c\u6325\u624b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u524d\u8a00 \u4e3a\u4e86\u5b9e\u73b0\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u7aef\u4e4b\u95f4\u7684\u8fde\u63a5\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528Socket\u901a\u4fe1\u3002 \u5728Socket\u901a\u4fe1\u4e2d\u6211\u4eec\u53ef\u4ee5\u9009\u62e9TCP [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[10],"tags":[30,31,29,26,27,28],"class_list":["post-150","post","type-post","status-publish","format-standard","hentry","category-java","tag-coding","tag-demo","tag-java","tag-socket","tag-tcp","tag-udp"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Java\u4e2dSocket\u5957\u63a5\u5b57\u7f16\u7a0b - It&#039;s MyGO<\/title>\n<meta name=\"description\" content=\"It&#039;s MyGO Java Java\u4e2dSocket\u5957\u63a5\u5b57\u7f16\u7a0b \u4f7f\u7528Java\u5bf9TCP\u548cUDP\u7684Socket\u8fde\u63a5\u7f16\u7a0bDemo\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, 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